pink组件
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<span>子组件接收到的sonCount: {{ sonCount }}</span>
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<button (click)="emitClick()">发射改父组件count的事件</button>
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<button (click)="propsClick()">直接调用父组件传递的方法</button>
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<button (click)="handlerClick($event)">事件的传参</button>
